Cumulative Total

Hi guys,

I'm in trouble to create a measure "cumulative total" that cumulates the number of employees in my department. If someone leaves I want the number to go down. In the following picture I created a test table to see if it works.

Now I want a column next to it with the following numbers:

1

2

1

2

1

2

1

I already tried the formula described on

https://www.daxpatterns.com/cumulative-total/

but it doesn't work for me. Can someone help me please?

Thanks in advance!